﻿/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 * Copyright (c) 2020 The Dotnetty-Span-Fork Project (cuteant@outlook.com) All rights reserved.
 *
 *   https://github.com/cuteant/dotnetty-span-fork
 *
 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
 */

namespace DotNetty.Common.Concurrency
{
    using System;
    using System.Collections.Generic;
    using System.Runtime.CompilerServices;
    using System.Threading.Tasks;
    using DotNetty.Common.Utilities;

    public class ImmediateEventExecutor : AbstractEventExecutor
    {
        private static readonly Task s_terminationFuture = TaskUtil.FromException(new InvalidOperationException());

        public override bool IsShuttingDown => false;

        public override Task TerminationCompletion => s_terminationFuture;

        public override bool IsShutdown => false;

        public override bool IsTerminated => false;

        public override bool WaitTermination(TimeSpan timeout)
        {
            throw new NotImplementedException();
        }

        public override void Execute(IRunnable task)
        {
            throw new NotImplementedException();
        }

        public override bool IsInEventLoop(XThread thread) => true;

        public override Task ShutdownGracefullyAsync(TimeSpan quietPeriod, TimeSpan timeout) => s_terminationFuture;

        protected override IEnumerable<IEventExecutor> GetItems() => new[] { this };
    }
}